2D electrostatic Force
Hi, I am modeling a slice of a simple comb capacitor in 2D. I would like to determine the force acting on the fingers. I can calculate the electric field, but when I try to determine the force through...
View ArticleMaxwell Stress Tensor
Hello all, I'm new to Comsol and Im having a little difficulty getting my head around how the Maxwell Stress Tensor operates. I understand its operation when applied to parallel wires (Like in the...
View ArticleOptimization of the minimum deviation from measured steady state conversions...
I have correctly assembled the model physics and have a working COMSOL model for the conversion of a certain species. This model does not incorporate any optimization. It is necessary to use...
View ArticleGenerate and plot 3D solution, given 2D solution
Hi all, I'm using weak-form modeling to solve for a vector field u(x,y,z). The vector field has 3 scalar components u1, u2 and u3. I know the functional form of the solution in the z-direction; it is...
View ArticleCooling of a metal box
Hallo to everybody! I'm trying to realize the simulation of a metal box (fillled with air and including an heat source, and surrounded laterally by other boxes that I consider through the...
View ArticleModel couplings: Integration vs. Summation over nodes
Hello, I am working with two modules Structural Mechanics and general form PDE as coupled. I need a model coupling to define an integration. When I choose "Summation over nodes", my model works fine,...
View ArticleIs there a way to do a temperature dependent heat source in Conjugated Heat...
Hi I'm working in the conjugated heat transfer physics and I'm hoping/wondering if there is a way to make the heat source temperature dependent. I have a cable that is covered with different materials...
View ArticleList expressions and predefined quantities in Maltab or Java
Hello everyone, I'm looking for a way to find the "expressions and predefined quantities" a model offers within matlab or java. Via COMSOL-GUI, this is simply possible by clicking one of the two...
View Articleparametric sweep in a contact problem
The attached file shows a simple axisymmetric problem in 4.3a where a screw-shaped part is being pushed into some uniform bone by an axial force. In the attached model, there are identity pairs between...
View Article3D geometry problems
Hello everyone, I am trying to solve an electric field problem using a 3D geometry comprised of five subdomains. The difference between the biggest domain (a cube with the edge of 40 micrometers) and...
View ArticleEigen Frequency Analysis of SAW Devices
Hi, I have a problem regarding the Eigen frequency calculation. I solve a simple 3D piezoelectric substrate (Y-Z cut LiNbO3) width of one wavelength (4 um) and depth of 10 wavelengths with periodic...
View Articlewindings providing regarding
Sir/madam, I am doing my m.tech project in modeling of motor using COMSOL.3.5a in 2D. I would like to know the way in which i can provide my three phase windings in the stator slots. Thanking you and...
View ArticleLinear Extrusion
Hi all. I' m now doing my research on modeling of climbing film using COMSOL. I'm using COMSOL 4.0 and I have problem regarding linear extrusion. Why I can't enter the values for sources &...
View Article[Issues with a mesh-NITF physics-Heat Flux Sensor simulation]
Dear all, I have an issue while adding an air layer to my model. Description of the project: I am trying to simulate a heat flux sensor in order to improve its design. To approach my sensor I need to...
View Articlenot function COMSOL
I study university of tre ( Italy) I gave program I bought the computer in iran after that I put license can not go next I would like to help thanks
View ArticleFluid-Porous Slip boundary conditon
Hello, I focus now on the flow and solute transportation simulation in the free flow and porous media. There are traditionally one singe formulation, typically Brinkman and two-domain coupling with...
View ArticleMultiple-size particle tracing
Hello everyone I have a short question on the particle tracing module. Does anyone know that whether it is possible to simulat particles of different sizes in the same model. How to implement this...
View ArticleEffect of prestress on eigenfrequency
Hello, I am trying to model the effect of the prestress on eigenfrequency of a vibrating string (clamped at both end with a prestress) The problem is that I am using 3.4 here. Would you please let me...
View ArticleMagnetic Force on an armature
Hello I'm dealing with a very simple problem that has been very frustrating for me! I would appreciate if any one can assist me with that. I'm modeling an E-shaped core in 2D magnetic field module. It...
View ArticleEvaluation of Volumteric displacement
Hi all, I am modelling a diaphragm deformed under pressure loading in an axisymetric model. I was wondeing if there is a way to evaluate volumetric displacemnt of the diaphrgam due to displacement....
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